Garmin GNC 300 Pilot's Manual page 64

REFERENCE
SECTION
NRST KEY
4
Special Use
Special Use Airspace
Airspace
Nearest SUA
Nearest SUA with controlling agency displayed.
NOTE: The GNC 300 will flash the U next to the M key
to inform you of SUA alerts. You do not have to repeatedly
check the nearest waypoint page for SUA information. It is
provided to supply more information on the SUA and its
boundaries. The GNC 300 will not flash alerts, however, if
it has been turned off or if your altitude is such that you
will not enter the buffered airspace. Turning off SUA alerts
and setting the altitude buffer is covered in Section 7. Any
SUA that meets the above conditions will be
displayed on the nearest pages.
54
The next page available under the GNC 300' s NRST key is the SUA alert page. The
SUA alert page will alert you with up to nine controlled or restricted airspaces near or in
your flight path, according to the following conditions:
• If your projected course will take you inside an SUA within the next 10
minutes, the message 'SUA ahead < 10 min' will be displayed.
• If you are within two nautical miles of an SUA and your current course will take
you inside, the message 'SUA Near & Ahead' will be displayed.
• If you are within two nautical miles of an SUA and your current course will not
take you inside, the message 'Near SUA < 2nm' will be displayed.
• If you have entered an SUA, the message 'Inside SUA' will be displayed.
Note that the GNC 300' s SUA alerts are based on three-dimensional data (latitude,
longitude and altitude) to avoid nuisance alerts. The alert boundaries for controlled air-
space are also sectorized to provide complete information on any nearby airspace. Once
you have met one of the described conditions, the message annunciator will flash, alert-
ing you of an SUA message.
To view an SUA message:
M
1. Press the key.
M
2. Press again to return to the previous page.
Once you are notified of an SUA alert, detailed information concerning the specific
SUA is provided by the NRST key.
To view the SUA alert page:
T
1. Press the key.
O
2. Rotate one stop to the right to view the SUA alert page.